Frost Dates
Frost Dates · Nevada

Frost dates for North Las Vegas, Nevada

Nevada · first & last freeze, from NOAA 1991–2020 climate normals

Typical last spring freeze (32°F)
February 1
median date, 1991–2020
Typical first fall freeze (32°F)
December 8
median date, 1991–2020
Typical frost-free season
310 days
between the median dates

In a typical year, the last spring freeze around North Las Vegas comes near February 1 and the first fall freeze near December 8. One year in ten, a freeze still arrives after February 24 in spring — and one year in ten, the first fall freeze has already landed by November 23. NCEI's own growing-season statistic (days between freezes, percentiled per year) puts the median at 311 days.

JFMAMJJASONDFebruary 1December 8
The year at a glance: blue bands span the 9-in-10 to 1-in-10 range where the last spring / first fall 32°F freeze lands; the green band is the typical frost-free window between the median dates. Measured at N Las Vegas, NV (USC00265705), 4.1 mi from the city's census reference point, elev. 1,898 ft. NOAA/NCEI 1991–2020 normals.

Freeze-date probabilities, three thresholds

ThresholdLast spring — 9 in 10 years past byLast spring — typical (median)Last spring — 1 in 10 years later thanFirst fall — 1 in 10 years byFirst fall — typical (median)First fall — 9 in 10 years by
36°F — near-freezing (frost can occur)January 31February 20March 9November 11November 26December 10
32°F — freezingJanuary 2February 1February 24November 23December 8December 27
28°F — hard freezeDecember 12January 4February 8December 1December 21January 24

Measured at N Las Vegas, NV (USC00265705), 4.1 mi from the city's census reference point, elev. 1,898 ft. NOAA/NCEI 1991–2020 normals. Read each date column as odds over the 30-year record — e.g. "9 in 10 years past by" means only one spring in ten saw a later freeze than that date.

Frost-free windows (computed)

Window (32°F ends)OpensClosesLength
Cautious (1-in-10 freeze risk at each end)February 24November 23272 days
Typical (median freeze dates)February 1December 8310 days
Gambler's (9-in-10 freeze risk at each end)January 2December 27359 days

Pure arithmetic on the freeze-date percentiles above — the "cautious" window opens on the date only 1 year in 10 still sees a later spring freeze, and closes on the date by which only 1 year in 10 has already frozen.

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